Jan 2014 – English Revision v1
Contents
1. Jan 2014 English Revision v1 4 The collaborators on the DADOS spectrograph project are e Max Planck Institut fur Extraterrestrische Physik www mpe mpg de e CAOS www eso org projects caos e Baader Planetarium GmbH Zur Sternwarte D 82291 Mammendorf Tel 49 0 8145 80 89 0 Fax 49 0 8145 80 89 105 www baader planetarium de DADOS Spectrograph User s Guide Thank you for purchasing this Baader Planetarium product To get the most out of your DADOS Spectrograph please read this instruction manual thoroughly before starting to work with the spectrograph Keep this User s Guide available for future reference and visit the Baader Planetarium website http www baader planetarium de for up to date information about the product Unpacking As you unpack the spectrograph check the list below and make sure that all items shown above are included If anything is missing contact your original retailer Standard accessories e DADOS spectrograph Allen Wrench 1 5 mm Eyepiece 20mm Allen Wrench 1 3 mm Eyepiece 10mm e 1 14 Stop ring 1905131 e Slit Viewer Assy Guiding lens with M28 8 thread e T2 Quick Changer 2456313 mounted at the Dados e T2 Quick Change Ring 2456320 mounted at the eyepiece barrel with Focusing eyepiece holder 2458125 e Gloves for changing the grating Manual 4 Part description 1 2 3 4 5 6 2 Nosepiece Slit illuminator 1 14 Slit view2. 2013 Pages 268 ISBN 978 1107601796 An Introduction to Modern Astrophysics Author Bradley W Carroll Dale A Ostlie Pub 2013 Pages 1478 ISBN 978 1292022932 Stellar Evolution Physics Physical Processes in Stellar Interiors Author Pub Pages ISBN Icko Iben jr 2012 906 978 1107016569 55 Stellar Evolutio n Physics 56 Astronomy Methods Astrophysics Processes Stellar Evolution Physics Advanced Evolution of Single Stars Author Pub Pages ISBN Icko Iben jr 2012 616 978 1107016576 Astronomy Methods Author Pub Pages ISBN Hale Bradt 2003 458 978 0521535519 Astrophysics Processes Author Pub Pages ISBN Hale Bradt 2008 536 978 0521846561 Stellar Spectral Classification STELLAR SPECTRAL Author Richard O Gray CLASSIFICATION Christopher J Corbally Pub 2009 Pages 592 ISBN 978 0691125114 57 WAVELENGTH SETTINGS Camera Grating Model Micrometer position Central Wavelength Camera Grating Model Micrometer position Central Wavelength Camera Grating Model Micrometer position Central Wavelength 58 WAVELENGTH SETTINGS Camera Grating Model Micrometer position Central Wavelength Camera Grating Model Micrometer position Central Wavelength Camera Grating Model Micrometer position Central Wavelength 59 Except for brief quotation in critical articles or r
3. 978 1107031746 An Introduction to the Theory of i Stellar Structure and Evolution Dina Prialnik 2000 261 9780521659376 51 Optical re Optical Astronomical Spectroscopy S TOMOMICd Spectroscopy Author Christopher R Kitchin Pub 1995 Pages 272 ISBN 0750303468 Atomic Spectra and Atomic Structure Author Gerhard Herzberg Pub 2007 Pages 527 ISBN 140675322X Observers Guide to Stellar Evolution GUIDE TO STELLAR EVOLUTION Author Mike Inglis Pub 2007 Pages 236 ISBN 1852334657 52 Spectrograph Design Fundamentals D Pub Pages ISBN Pub Pages ISBN OUFMEY from ihe Auth Cente E Pub af the Pages ISBN JACK B ZIRKER LEE Author Author Spectrograph Design Fundamentals John James 2007 204 10 0521864631 Practical Amateur Spectroscopy Stephen F Tonkin et al 2002 210 1852334894 Journey from the Center of the Sun Jack B Zirker 2002 302 0691057818 53 The Behavior of Chemical Elements in Stars Author Carlos Jaschek Pub 1995 Pages 324 ISBN 052141136X The Classification of Stars Author Carlos Jaschek Pub 1990 Pages 413 ISBN 0521267730 54 Introduction to Stellar Astrophysics Vol 3 Stellar Structure and Evolution Author Erika Boehm Vitense Pub 1992 Pages 285 ISBN 0521348714 Stellar Evolution Physics Introduction to Astronomical Spectroscopy Author Immo Appenzeller Pub
4. on the page 5 diagram to a fluorescent light source or a neon lamp Do not point directly to the Sun Rotate the focuser 7 in order to focus the spectrum 11 12 Lock the focus with the locking screw once sharp focus is achieved Rotate the focusing eyepiece holder for fine focus adjustments 2 3 Changing the spectral range Slightly loosen the grating angle locking screw 9 Center the spectral lines of your choice by adjusting the micrometer Tighten the grating angle locking screw 9 to secure the selected setting 13 2 4 Observing some common light sources DADOS lets you observe and analyze a large variety of light sources Specifically you can quickly set up the instrument to observe e Neon lamps some pilot lights in washing machines multi outlet power strips etc e Fluorescent lamps e Continuous spectral sources like tungsten or halogen lights e Bright daylight Aim at the clear blue sky well away from the sun Never point directly towards the Sun 14 Examples of spectra taken with DADOS and a 200 lines mm grating HeAr calibration lamp Neon Continuous 1 and 2 order Solar spectrum Note Spectra obtained with Canon 10D EOS Camera at different grating angles The calibration Lamp is only visible in the dark Shield it from daylight or connect it to DADOS 15 Examples of spectra taken with DADOS
5. and a 900 lines mm grating HeAr calibration lamp MN MMA I I Fluorescent Continuous Solar spectrum Spectra obtained with Canon 10D EOS Camera at different grating angles The Calibration Lamp is only visible in the dark Shield it from daylight or connect it to DADOS 16 17 3 Configuring DADOS for astronomical observation The spectrograph should be set up correctly to ensure proper function 3 1 Coupling a detector to DADOS 3 1 1 Astronomical CCD camera The DADOS optical design is optimized to cover the field of CCD chips with a dimension of 13 8x9 2mm and a pixel size of 9um Detectors having larger chip size than 13 8 x 9 2 mm may be used however the optical image quality and therefor the resolution will slightly decrease at the edges Prepare the detector to be used in the observation preferably SBIG ST 402ME STF 8300 FLi ML 1603 Use the Baader T2 quick changer system as the ideal device for coupling and rotating the camera without loss of focus 19 20 Mount the T2 change ring onto the SBIG detector Mount the quick changer onto the T2 male thread of the DADOS collimator focuser 7 Join the detector and the change ring combo Rotate the camera into the desired orientation Clamp the camera by tightening the locking screw of the T2 quick changer DADOS with imaging detector mounted 21 3 1 2 SLR or D SLR body Obtain th
6. ctional purposes The device is very easy to use robust and versatile Please read this entire manual carefully to achieve the maximum use from this device The DADOS main features are Optimized for telescopes up to 14 aperture at f 10 Choice of 3 slits 25 35 and 50 um A red LED provides background illumination of the slits for easier focusing of a self guiding camera Default grating of 200 I mm for low resolution optional 900 I mm grating for higher resolution Micrometer for fine positioning of the central wavelength The objective camera port has a built in wide focusing range and uses the standard T2 adapter thread M42 x 0 75 Accepts most CCD and DSLR cameras with optional adapters The camera interface is a T2 adapter with a standard M42 x 0 75 thread The wide 55mm focusing range is suitable for attaching a DSLR camera Never aim DADOS straight to the Sun Irreversible eye damage will occur 2 Quick setup 2 1 Attaching an eyepiece to the focuser 10 Remove the T2 dust cap by rotating it counterclockwise Mount the Baader T2 quick changing system 2456313 2456320 Lock the Baader T2 quick changing system and mount the focusing Baader eyepiece holder 2458125 Insert the DADOS 20mm eyepiece or the DADOS 10mm eyepiece for higher magnification into the focusing eyepiece holder Lock the eyepiece with any of the three locking screws Point the 2 nosepiece 1
7. e with the proper orientation Attach DADOS onto the Telescope with a 2 interface if using the 2 nosepiece Align the instrument to the telescope For equatorial mounts the best orientation is with the slit parallel to the right ascension axis Ensure the attachment of the instrument to the telescope by locking the proper adapter screws Then slew the telescope to a bright star 34 Use the telescope s focusing mechanism to focus the star in the middle of the slit by observing its image through an eyepiece or webcam Use the slit illuminator 2 to illuminate the slits and slowly slew the telescope to bring the star inside one of the slits Switch off the slit illuminator before starting an exposure with the detector 35 Appendix A Maintenance A 1 Battery replacement 36 Simply turn the back of the Illuminator counterclockwise approximately three turns to open the battery compartment Replace dead batteries with two round hearing aid batteries 1 5V such as Camilion AG 3 SR 41 2454306 Then turn the back of the illuminator clockwise till it is completely closed A 2 Grating replacement Touching the grating will destroy it beyond repair Do not attempt to remove dust by breathing or blowing air onto the grating Small droplets of moisture and saliva can permanently damage the grating as well Do not use compressed or canned air This will likewise transport moisture
8. e appropriate T Adapter for your type of camera Prepare the DSLR camera body to be attached to the spectrograph Screw the DSLR T Ring onto the spectrograph focusing unit Attach the camera to the T Ring adapter 22 Open the three set screws of the Camera T Ring Rotate the camera body into the desired position Lock the three set screws of the camera T Ring DADOS with mounted DSLR camera 23 3 2 Fine focusing of the camera objective Whether you have an astronomical CCD camera or a SLR body follow the instructions below to achieve the best possible focus of the instrument Loosen the focuser locking screw 8 to focus the detector Rotate the focuser 7 in order to focus the spectrum Lock the focus with locking screw 8 when sharp focus is seen or recorded 24 3 3 Selecting wavelength range Slightly loosen the grating angle locking screw 9 Center on certain spectral lines by rotating the micrometer 5 Tighten the grating angle locking screw to secure the selected setting Prepare spectral charts of labora tory lamps If you want to download the spectral charts of some laboratory lamps go for example to http www eso org projects caos 25 3 4 Using the slit viewer 3 4 1 Attaching an eyepiece to the slit viewer 26 Mount the slit viewer onto the 20mm DADOS guiding eyepi
9. ece Slit viewer attached to eyepiece Slide the 1 44 stop ring onto the eyepiece s chrome sleeve and lock it Insert the eyepiece assembly into the 1 14 slit viewing port 8 Focus the slit by manually pushing or pulling the eyepiece After having focused the image of the three slits lock the eyepiece by using the locking screw 4 of the 1 1 4 slit viewing port 3 Open the set screws of the stop ring and move it ring down to sit flush on top of the eyepiece holder Tighten the stop ring to secure proper focus position DADOS with mounted slit viewer assembly 27 3 4 2 Attaching a webcam to the slit viewer 28 Remove the 18mm long 1 1 extension tube of the slit viewer assy Mount the remaining body of the slit viewer onto the 1 1 4 nosepiece of the webcam Example Celestron Nexlmage 5 with the 1 1 4 nosepiece Slide the 1 44 stop ring onto the webcam nosepiece Attach the webcam combo to the 1 1 slit viewing port 3 Focus the Webcam by manually pushing or pulling it Rotate the Webcam body until it is approximately aligned with the major axis of DADOS After having focused the image of the three slits lock the webcam combo by using the locking screws 4 of the 1 74 slit viewing port 3 Open the set screws of the stop ring and move it to sit flush on top of the eyepiece holder slit viewing port 29 30 Tighten
10. ectroscopy Author Gerhard Herzberg Pub 1989 Pages 300 2 Getting the Measure of the Stars Author W A Cooper Pub 1989 Pages 293 ISBN 0852748302 48 Handbook of CCD Astronomy Handbook of GCD Astronomy Author Steve Bruce Howell Pub 2006 Pages 208 ISBN 0521852153 Astronomical Spectroscopy an WNC Introduction to the Atomic and SPECTROSCOPY Molecular Physics of Astronomical Spectra Author Jonathan Tennyson Pub 2005 Pages 192 Keith Rpbinson Spectroscopy the Key to the Stars li Reading the Lines in Stellar Spectra Spectrescopy Or YEN Author Keith Robinson o mm Pub 2007 Pages 160 ISBN 9780387367866 49 FOUNDATIONS ASTRONOMY PM Author i Pub Pages ISBN Foundations of Astronomy Michael A Seeds 2000 656 0534378552 The Observation and Analysis of Stellar Stellar Photospheres Photospheres Bee Author David F Gray Pub 2005 Pages 533 ISBN 0521851866 Pub 50 Author Pages ISBN Observing Variable Stars Gerry A Good 2003 2 4 1852334983 Pub Pages ISBN THE ANAL YSIS Author Physics of Star Formation in Galaxies Francesco Palla 2002 232 3540431020 The Analysis of Starlight One Hundred and Fifty Years of te Astronomical Spectroscopy STARL IGHT RW N BU Author Pub Pages ISBN Stellar Structure and Evolution LEK Author es Pub Pages ISBN John B Hearnshaw 2014 448
11. er port Slit viewer port locking screws Micrometer Rotation stage counter spring pre adjusted do not touch Focuser Focuser locking screw Grating angle locking screw en For a full list of accessories see Appendix D Table of Contents 1 INTRODUCTION 2 QUICK SETUP 2 1 Attaching an eyepiece to the focuser 2 2 Focusing the spectrum 2 3 Changing the spectral range 2 4 Observing some common light sources 3 CONFIGURING DADOS FOR ASTRONOMICAL OBSERVATION 3 1 Coupling a detector to DADOS 3 1 1 Astronomical CCD camera 3 1 2 SLR or D SLR body 3 2 Fine focusing of the camera objective 3 3 Selecting wavelength range 3 4 Using the slit viewer 3 4 1 Attaching an eyepiece to the slit viewer 3 4 2 Attaching a webcam to the slit viewer 3 4 3 Zooming the slit view in and out 3 5 Coupling the spectrograph to the telescope 3 6 Operating the spectrograph at the telescope APPENDIX A MAINTENANCE A 1 Battery replacement A 2 Grating replacement 10 10 11 13 14 18 19 19 22 24 25 26 26 28 31 33 34 36 36 37 APPENDIX B CARE OF THE OPTICAL COMPONENTS APPENDIX C SPECIFICATIONS APPENDIX D OPTIONAL ACCESSORIES APPENDIX E BIBLIOGRAPHY 43 44 46 47 1 Introduction The DADOS spectrograph is an instrument that displays the spectra from different light sources The name DADOS means dice in Spanish It was designed to be used as either a spectroscope or as spectrograph mainly for astronomical and instru
12. eviews no reproduction of this manual in any form in whole or in part may be made without written authorization of Baader Planetarium GmbH e Baader Planetarium GmbH Zur Sternwarte D 82291 Mammendorf Tel 49 0 8145 80 89 0 Fax 49 0 8145 80 89 105 www baader planetarium de 60
13. grease or propellant onto the grating Any exchange of grating holders should always be performed in clean surroundings free of dust and static build up Arrange your workplace for ensure a quick and clean grating exchange 37 38 Have the 900 lines mm grating with holder readily available Loosen the grating angle locking screw 9 by one turn only Rotate the micrometer backwards to show an 8mm setting on the Vernier scale Use the 1 5mm Allen wrench to remove the four hex head screws Take off the side plate grating holder assembly Be careful not to touch the grating Release the headless set screw inside of the pressure plate by 2 full turns counterclockwise using the 1 5mm Allen wrench Remove the grating holder from the pressure plate Take the 900 lines mm grating holder out of the storage container and store the 200 lines mm grating in it 39 40 Place the 900 lines mm grating holder into the pressure plate Rotate the grating holder to adjust the proper position in regard to the markings in the pressure plate Each mark indicates the position of a specific grating Be sure to use the proper one to achieve the optimal throughput Example of position 200 lines mm grating Example of position 900 lines mm grating Lock the pressure plate by tightening the headless set screw clockwise Carefully replace the side plate grating holder as
14. on camera objective axis and 25 um slit Grating of 200 lines mm Theoretical Measured A nm 396 542 416 606 647 616 668 723 697 Grating of 900 lines mm Theoretical Measured A nm 2038 2000 371 3910 3000 561 5376 5000 800 Limiting magnitude for a 30 cm telescope with S N 50 and 20 minutes of exposure time For the 200 lines mm grating my 8 For the 900 lines mm grating my 6 Note Measurements performed w ST 8 XME w 9 micron pixel size The measured resolving power of the 900L grating was limited by the pixel matching With smaller pixels a higher resolution can be measured 45 Appendix D Optional accessories 46 T2 adapters for many SLR camera models Examples Nikon Ref 240 8300 Canon EF Ref 240 8319 See the Baader Planetarium Web site for a complete list Reflection grating 25 x 25 x 9mm 900 lines mm mounted in quick exchanger Ref 245 8555 Calibration Neon lamp for DADOS with 220V power cord and 2 adapter Ref 245 8590 Travel case for DADOS with flexible compartments for tools Ref 245 2110 Dados rings for mounting on tripods or optical bench B Nr 245 8593 47 Appendix E Bibliography Stars and Their Spectra An Introduction to Spectral Sequence STARS Author James B Kaler AND THEIR SPECTRA Pub 1989 Pages 300 ISBN 0521304946 The Spectra and Structures of Simple Free Radicals an introduction to Molecular Sp
15. sembly Replace and tighten the 4 screws that secure the side plate 41 42 Adjust the micrometer to a Vernier position of approximately 2 5 Lock the grating tilt mechanism by rotating the grating angle locking screw clockwise DADOS with grating exchanged Appendix B Care of the Optical components If you always use dust caps after working with the DADOS no cleaning will be necessary Dust can only be cleaned from the grating and slit by Baader Planetarium Do not clean gratings or slit yourself as this may void the warranty Lenses cannot be cleaned with common cleaning agents Use only Baader Planetarium Optical Wonder fluid 2905007 to clean the lenses 43 Appendix C Specifications Mechanical Weight without cameras and 0 85 kg eyepieces Dimensions see Figure in Part 80 x 150 x 205 Description mm Electrical Red LED Battery SR 41 or equivalent Environmental Operating temperature 10 to 30 C Storage temperature 30 to 35 C Humidity relative O to 80 Storage humidity O to 60 Optical Collimator focal ratio o Collimator focal length 80 mm Objective focal length 96 mm Collimator Camera angle 90 Dispersion on axis at 550 nm 200 lines mm grating 39 7 nm mm 900 lines mm grating optional 10 6 nm mm Using the DADOS with a telescope of lower focal ratio than f 10 degrades the resolving power and increases the vignetting 44 Performances Resolving power AA
16. the Stop Ring to secure the proper focus position Realign the orientation of the slit by rotating the Webcam DADOS with Webcam mounted on to the slit viewer port 3 4 3 Zooming the slit view in and out The lens inside the slit viewer can be adjusted in order to magnify the image size of the 3 slits on the detector of the Webcam Remove the second 1 1 extension tube from the slit viewer body Loosen the headless set screw inside the slit viewer body by only 1 2 turn using the supplied Allen wrench 1 3mm Slide the lens holder tube towards the Webcam to reduce image size 31 32 Minimum magnification as seen by the CCD chip Slide the lens holder tube away from the Webcam in order to magnify the image Maximum magnification as seen by the CCD chip Lock the new position of the lens holder tube by tightening the headless set screw Remount the slit viewer body onto the webcam with one 18mm extension tube 3 5 Coupling the spectrograph to the telescope Use the provided 2 nosepiece to attach DADOS to your telescope Alternatively use the female T 2 thread M42 x 0 75 by removing the 2 nosepiece Or remove the female T 2 thread adapter to get access to a female 2 thread in DADOS body 33 3 6 Operating the spectrograph at the telescope Before attaching DADOS to the telescope make sure you have already focused the spectrum on the camera s focal plan
Download Pdf Manuals
Related Search